JPH0360041U - - Google Patents
Info
- Publication number
- JPH0360041U JPH0360041U JP12135689U JP12135689U JPH0360041U JP H0360041 U JPH0360041 U JP H0360041U JP 12135689 U JP12135689 U JP 12135689U JP 12135689 U JP12135689 U JP 12135689U JP H0360041 U JPH0360041 U JP H0360041U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- operational amplifier
- inverting input
- collector
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
第１図は、本考案による回路を用いたサーミス
タ温度変換器の一実施例を示す回路図であり、同
図ａはサーミスタ温度変換回路、同図ｂは、電圧
・周波数変換回路である。第２図は、本考案の実
施例における出力電圧Ｖｒと温度との関係を示す
グラフである。第３図は、本考案の実施例におけ
る出力電圧Ｖｒと電圧・周波数変換回路の出力ｆ
ｏの直線性誤差を示すグラフである。第４図は、
従来のサーミスタ温度変換器の一例を示す回路図
であり、同図ａは、サーミスタ温度変換回路、同
図ｂは、電圧・周波数変換回路である。第５図は
、従来のサーミスタ温度変換回路における出力電
圧Ｖｒと温度との関係を示すグラフである。第６
図は、従来のサーミスタ温度変換回路における出
力電圧Ｖｒと電圧・周波数変換回路の出力ｆｏの
直線性誤差を示すグラフである。
１…演算増幅器、２…定電圧回路、３…電圧比
較器、４…モノステーブル・マルチバイブレータ
ー、５…スイツチ。
FIG. 1 is a circuit diagram showing an embodiment of a thermistor temperature converter using a circuit according to the present invention, in which FIG. 1A shows a thermistor temperature conversion circuit, and FIG. 1B shows a voltage/frequency conversion circuit. FIG. 2 is a graph showing the relationship between output voltage Vr and temperature in the embodiment of the present invention. FIG. 3 shows the output voltage Vr and the output f of the voltage/frequency conversion circuit in the embodiment of the present invention.
It is a graph showing the linearity error of o . Figure 4 shows
1 is a circuit diagram showing an example of a conventional thermistor temperature converter, in which FIG. 1A shows a thermistor temperature conversion circuit, and FIG. FIG. 5 is a graph showing the relationship between output voltage Vr and temperature in a conventional thermistor temperature conversion circuit. 6th
The figure is a graph showing the linearity error between the output voltage Vr in a conventional thermistor temperature conversion circuit and the output fo of the voltage/frequency conversion circuit. 1... operational amplifier, 2... constant voltage circuit, 3... voltage comparator, 4... monostable multivibrator, 5... switch.
Claims (1)
れ、反転入力とグランド間には基準抵抗の替わり
にサーミスタが接続され、出力にはトランジスタ
のベースが接続され、更にトランジスタのエミツ
ターは前記演算増幅器の反転入力に接続され、コ
レクターは負荷抵抗を介して任意の電源に接続さ
れ、前記トランジスタのコレクターと負荷抵抗の
接続点から温度変換信号が得られる回路において
、前記演算増幅器の反転入力に任意のバイアス電
圧を印加したことを特徴とするサーミスタ温度変
換回路。 A reference power supply is connected to the non-inverting input of the operational amplifier, a thermistor is connected between the inverting input and ground instead of a reference resistor, the base of a transistor is connected to the output, and the emitter of the transistor is connected to the operational amplifier. An arbitrary bias is applied to the inverting input of the operational amplifier in a circuit in which the collector is connected to an arbitrary power supply through a load resistor, and a temperature conversion signal is obtained from the junction of the collector of the transistor and the load resistor. A thermistor temperature conversion circuit characterized by applying voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12135689U JPH089618Y2 (en) | 1989-10-17 | 1989-10-17 | Thermistor temperature conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12135689U JPH089618Y2 (en) | 1989-10-17 | 1989-10-17 | Thermistor temperature conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0360041U true JPH0360041U (en) | 1991-06-13 |
| JPH089618Y2 JPH089618Y2 (en) | 1996-03-21 |
Family
ID=31669390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12135689U Expired - Lifetime JPH089618Y2 (en) | 1989-10-17 | 1989-10-17 | Thermistor temperature conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089618Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022106378A (en) * | 2021-01-07 | 2022-07-20 | ミツミ電機株式会社 | Temperature measuring circuit and temperature measuring device |
-
1989
- 1989-10-17 JP JP12135689U patent/JPH089618Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022106378A (en) * | 2021-01-07 | 2022-07-20 | ミツミ電機株式会社 | Temperature measuring circuit and temperature measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH089618Y2 (en) | 1996-03-21 |